MTEL Chemistry Practice Exam

Category - General Chemistry

As atomic number increases in a group of the periodic table, which of the following atomic properties decreases?
  1. Electronegativity
  2. Metallic character
  3. Atomic mass
  4. Atomic radius
Explanation
Correct Response: A. Electronegativity decreases going down a group (column) of the periodic table. For example, fluorine has a higher electronegativity than that of iodine. B is incorrect because metals are on the left of the periodic table and nonmetals are on the right. C is incorrect because atomic mass increases going down a periodic table group. D is incorrect because atomic radius increases going down a group as a result of the presence of electrons in orbitals that are farther from the nucleus.
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